Penel I was really interested to read what you were saying about the T-shirt - although I realise it is not suitable atm.
My youngest child has Sensory Integration Dysfunction - now I know dogs are different from people - but one of the difficulites she has is modulating responses to fear, frustration, sensation and so on. One of the hting sthat works for these kids is firm touch/ deep pressure (I am busy trying to find a lap pad for her at present). When she is stressed, she is often calmed by a firm and lasting hug.
Honey is an anxious dog - but obviously not this severe. But I have noticed that she likes firm and definite touch, as opposed to light touch. If I am grooming her for example she becomes very stressed - she will try to get really close to me and she sometimes presses her head quite firmly against me. She did this from the very youngest age and she certainly got comfort from it. She never liked to be walked on a collar - but seemed to love the security of a harness.
I just wonder if dogs can suffer from these sensory anomalies in the same way as humans - I mean I don't see why they wouldn't. It puts children into a constant state of stress, because their systems are overwhelmed - kids with ASD suffer also. It affetcs not only the senses we immediately think of , but the proprioceptive (body awareness) and vestibular as well.
I am maybe talking nonsense - but I just thought what you said was interesting.