TandL's Mum, I am only responding to this because your boy is nine. I got PTSD at age 12 as a result of older boys drugging me with
LSD. I have now had it for 38 years and have been deprived of a normal life including children of my own. Doctor will not tell you, but I lived it: PTSD in children leaves the worst damage. As a sufferer I see my life in two parts: Me before and me after. The sufferer wants to get back to the way they were. As you can image getting PTSD at 20, then turning 30 and picturing yourself well, you picture a person that look much the same. When you get PTSD at 12, then turn 22, then look back that same 10 years the 22 year old sees a self that he no longer looks like. This is not something any doctor understands or will explain. Because of the age I got PTSD I have a soft spot for children with PTSD and have been lucky enough to have a few parents let me meet their young sons (in both cases).
Just my 2 cents about the specially trained dogs: Poppycock! I've seen over 30 years of treatment and some unbelievable scams and nonsense perpetrated on patients. I had a doctor tell me to put sesame seed oil up my nose, as just one example. They are also pushing this "horse therapy" nonsense. I bought a horse 8 years ago for recreational, not therapeutic reason (especially since horse therapy did not exist then). According to their theory I should have gotten better owning a horse, but it made no difference and I continued to decline at the same "pre-horse" rate. Most therapists are frauds. You need to ask yourself one question: How would you specially train a dog to help someone with PTSD? I have extensive experience training guard dogs and scent/tracking dogs and I cannot fathom any dog trained in any way that could help someone with PTSD except if that person feels better having the affection of a pet, as is common with non PTSD people. I that case I'd say an affectionate non-specially trained dog would work just the same.
PTSD is the new wholesale, catchall diagnosis. It is often now overdiagnosed and I hope in your son's case the diagnosis is wrong because it is nearly impossible to cure the real thing. Therapists did me far more damage than good and I've seen no improvements in the methods in the last 38 years. Best of luck.