I have brother and sister Shesties. (westie/shitzhu cross). They are 7yo.
The boy dog is ultra sensitive and temperamental. He is fine if he comes to you on his own terms, but does not really like being handled, picked up, groomed etc. he is also very sensitive to noise, low level rumble type noise, so cooker fan, washing machine, vacuum, he leaves the house as soon as something is switched on. If in a confined space ie my husbands car (sports car) he turns into a Tasmanian devil. He is fine in my car, 4x4 different sound.
He has never liked baths. He will not go to a groomer, we have tried. He goes mental at the sound of clippers. The only thing I can do is snip away with scissors, even that is under duress, and he just growls and walks away when he's had enough.
Anyway, he developed a skin condition and we had no choice but to get the vet to clip him under sedation. We now have to bath him with special shampoo. I washed him yesterday but he was growling and snarling and tried to bite me. Luckily he didn't draw blood and I don't blame him at all. He doesn't like it and was telling us his displeasure. But what can I do. He has to be bathed. I need to get him used to it regularly, rather than a couple of times a year. We had just got used to his grumpiness- he is all the more endearing for it, but this is a big issue. His sister is fine and no problem at all.