I have been meaning to write to you for years to thank you for your books. We were on the right track with our then four year old son, Jack (now coming up to 10) when I read "Different Kids". I already suspected ADHD and knew very well that he reacted to food as do I. Jack had his first food reaction at 20 weeks gestation! I ate some of those awful red sugar-coated peanut things and he just went berserk, looping the loop and throwing himself all over the place for about an hour or so. So we were prepared.

I breastfed him for nearly three years - breastfeeding was only time I got to lie down and rest. He was a "windy" but fairly normal baby early on and I did avoid any foods in my diet that seemed to cause problems. He never liked to be left alone and would panic if put down while awake. From three months constant movement and novelty was required to keep him happy. When he was happy he was radiant and when he was not he was grizzly and constantly squirming with this giving way to frantic screaming if the boredom lasted for more than a few minutes. Out shopping, strangers loved him as he responded with such joy to any attention and he was a very attractive baby. I had to carry him on my back in a sling, the stroller was too boring, too far away from me and not social enough. I accepted all this as I had been told I was a very, very difficult baby - colic - and my expectations were therefore "realistic".

At four months I began to introduce solids - rice cereal with breast milk to mix. The novelty seemed to appeal to Jack! Then I began to mix a small amount of orange juice in with the cereal to boost iron absorption. From there I introduced apple, ripe banana, pureed vegies (broccoli, pumpkin, etc.). He wasn't so keen on this but I heard about adding cheese to make the vegies more appealing, so I did this, often using parmesan cheese as well as milder cheeses. Jack loved bolognaise sauce mixed in too. Another favourite was avocado. He loved apricot and yogurt. He had a small amount of mashed prune to counteract a tendency to constipation. I was so pleased that he ate well and proud he had such a good appetite and such an ideal diet. When others asked how he slept (pretty awfully) I could at least say, "But he eats really well".

Meanwhile our little boy was getting more and more grumpy and demanding and more and more miserable when he wasn't amused. I looked frantically for the "ideal toy" the thing that would hold his attention. Each new item was met with delight and then discarded within thirty seconds and the grizzling began again.

Jack woke at least twice a night. He was into everything and seemed to always want more - more - more. He wasn't babbling - ba ba ba & da da da at 10 months. (In retrospect, the first sign of his problems with auditory processing that later resulted in speech delay and difficulty in learning to read.) He never sat and played. He never sat! He went straight from crawling to being dissatisfied because he couldn't yet walk.

From the 4 months we put his "difficult" and unhappy behaviour down to "teething". The first tooth didn't appear until eleven months.

When Jack was four months old I ate a small amount of dark chocolate in an ice-cream and about one hour later breastfed Jack. Within half an hour he was screaming inconsolably and instead of being tense as crying babies are he just lay back in my arms in an almost relaxed way as he screamed (low muscle tone no doubt). I identified the chocolate as the most likely culprit - I'm now sure I was right. After Jack went to sleep I sat up and expressed my other breast out into a

He was still a delightful, smiling, social child as long as he had the undivided attention of someone and a constant stream of novelty.

I've gone into this first year in detail because it really shows most clearly what was going on even if it was not obvious at the time.

My second child, a daughter called Ellen, was born when Jack was nearly 3 and a half. Jack was delighted and adored his little sister. The pregnancy was complicated by my blood pressure going high from 23 weeks. My mother came to look after us all as I was meant to be resting as well as taking anti-hypertensive medication. My mother just couldn't take Jack's behaviour.

I had been avoiding wheat in Jack's diet as I believed I had a problem with it. (My problem was actually with calcium propionate (282), of course, but cutting out all wheat did solve my problems of fatigue and fuzziness and so for years I thought I needed to avoid wheat). For convenience we changed to normal white bread from the supermarket. Jack loved it after the drier rye bread I had used formerly. I had not a clue about the preservative in the bread. Jack's behaviour went from bad to atrocious.

Jack's behaviour was at its all-time worst between the ages of 3 and 4. It was during this time he was eating the preserved bread. He put his hand through a windowpane during a tantrum. He woke with nightmares and screamed madly about and it was impossible to get through to him.

He went to bed late, reappearing often saying he was hungry and wanting (surprise, surprise) another slice of bread. He would wake at 4.30 in the morning wanting to be entertained. The only toy he persistently liked was his ride-on car. His behaviour and manner were almost autistic but for his insatiable sociability. His speech was very delayed and I don't think he really understood a lot of what was said to him. He was however very imaginative and inventive and liked to play pretend games, but always with someone. He had no liking for being read to but preferred to have me act out stories with both of us taking roles.

Needless to say I was exhausted and miserable. We lived half an hour out of town. My husband, Nick, was at that time managing farms. It was a very similar situation to yours, I think.

Jack was going to preschool in town a few days per week. Although they did not complain about Jack's behaviour (he has never been physically aggressive towards other people, even at his very worst and he's never said "I hate you" either - he is a very gentle character) When pressed they would say he was a bit weird, hiding in the playhouse and refusing to come out when the others were sitting on the mat listening to stories and taking off outside at inside time, etc, but he was only three so a lot of immaturity was allowed for.

My mother and my husband, Nick and I discussed Jack and his behaviour and decided that his things had got much worse around the time of the change in bread type. I took Jack of all wheat. The change was astonishing. He could have his socks put on without going berserk. You could talk to him and he would act on what was said. He didn't scream through everyday tasks such as bathing, dressing etc. When he went to preschool that week I dropped him off and didn't say anything about the changes. When I picked him up the teacher approached me and said "What have you done - he's a different child - he's playing with the others and listening to us."

Just before Jack went off wheat he had been assessed by a speech therapist at the preschool. She diagnosed, as best she could -we couldn't really keep Jack in the room much less anything like on-task - a severe expressive language delay and a moderate receptive language delay. Six weeks, later when off the wheat products, was reassessed by the same speech pathologist, using the part of the test that Jack had not done due to being non-cooperative. This time he seemed to have no significant receptive language delay and was only mildly delayed in his expressive language. She said she had never seen a child change so dramatically within such a short period of time.

Of course avoiding wheat meant avoiding a lot of foods, such as sausages. So Jack's diet also became generally blander and so did Jack. He was still difficult but at least he was "on the planet" now. He was only four but used to ask me "Why am I so happy, Mum?"

After a couple of months I screwed up my courage to do a challenge for wheat. I cooked some pikelets so I knew just what had gone into them. No reaction other than a very happy child - yummy pikelets!

I challenged with bread, planning to do two-week-on -- two-week-off challenges to see if any difference was apparent. That challenge lasted for two slices of bread fed to Jack at 4.30 on a Friday afternoon (timed so as to coincide with the weekend when Nick would be about)!! Within forty-five minutes, Jack was off his brain. Screaming, upset by everything - he finally went to bed and woke at 4.30 and was off again. This reaction lasted as a major thing for three days and Jack was unsettled for at least a week afterwards. Nick strapped Jack into his car seat and spent a lot of time driving around checking the property that weekend! We have never rechallenged this one as Jack himself has no desire to repeat that particular experience and neither have we.!!

The clinic sister I went to for Ellen was very supportive of my efforts to unravel the cause of Jack's problems with diet. When I had identified bread as being a huge problem she pointed out that bread did contain a preservative. She did not know anything particular about this preservative and its effects and she only mentioned it because preservatives were believed to be a cause of behaviour problems in children. Unfortunately I didn't take this too seriously at that time - I still believed that they wouldn't put anything this harmful in our "daily bread" and therefore the preservative couldn't be that harmful.

I spent the next year or so thinking our problem was yeast. I also noticed that a lot of Italian food caused major problems and made Jack pale and blobby looking as well as affecting his behaviour.

It was around this time I found and read "Different Kids" and it all began to make sense. What I had been doing as a mixture of the observation that the blander the diet the blander the children, my little clinical-trials-with-one-(or two, three or four) participant(s) and intuition could now be done with structure. I think you saved us another three to four years of misery, money wasting and mucking about.

These days my husband says he feels better and doesn't get headaches any more. I've found I react to many things and I compete with Jack for the most sensitive-in-the-family status. Ellen reacts to salicylates by becoming easily enraged and blaming everyone for everything. She is, by the way, the most un-ADD person I've every met - highly organised, very logical, and a real old head on young shoulders -very knowing and mature and reasonable. She is also extremely bright and academically gifted especially with maths.

Jack becomes hyper and idiotic and unable to learn when he has more than moderate salicylates in his diet. His salicylate reaction is a rapid-onset-rapid- resolution-type reaction. Amines used to make him irritable and as close to aggressive as he got but these days the reaction takes the form of a migraine. Jack still has academic problems related to his ADD and particularly to his auditory processing disorder. He is on Ritalin for school. I liken it to wearing glasses and tell him his sister wears glasses at school to help her eyes focus and he needs Ritalin to help his mind focus. He takes a very small dose (1 tab then 1/2 tab three hours later) and he finds it very effective. He does not take it at weekends usually although he would have a dose if we were going to do something that required good behaviour despite being bored or to help with a task requiring concentration and organisation such as making a model etc. He also asks for a dose if he his anxious to be on his best behaviour.

We also need to apply behaviour modification techniques on a daily basis - I did a Triple P course and this has been immensely helpful in managing Jack.

To put it simply, our approach to Jack's behaviour and other problems three-tiered one: First comes diet and general good health including adequate sleep and food - this is essential as if his diet, in particular, is off then nothing else is really effective.

Second comes the behaviour modification. I believe a lot of poor behaviour in children is caused by not being able to understand their environment. It seems to me that all effective behaviour modification systems provide not only rewards and punishments but more importantly they organise and simplify the social environment for all players. This consistency enables children who have trouble reading those around them to understand what is happening and they are therefore able to comply.

And thirdly, medication is the icing on the cake. It does cause Jack persistent appetite suppression and sleep problems. (The appetite suppression can be a good thing for parties though as he will only pick at plain chips and have a bit of lemonade if on medication!) Once again thank you so much for your books - and for the great website, and please sign us up for your newsletters, discussion group and kids discussion group! - Alison, Queensland