Does she lunge before she rides? I wonder if that would help, if he's just fresh and that's why he's bucking. If it's just a bad habit he has though that probably won't help
I was told that when I got my horse too! They said he was terrified of hoses. First time I tried to give him a bath, he stood in the crossties and hardly even moved the entire time
I don't think there's really a set age, and it depends more on the mare. I do know that mares over 15 are more likely to have fertility issues, but that doesn't necessarily mean all mares above 15 can't be bred. @Overo Mare probably knows more about this than me though lol
Rope halters really aren't hard to put on lol. If you're starting a horse in halter it is better to start in a rope halter versus a regular one, I believe. That's what I did at least
How do you wash your tail? I always soak Kenny's tail in a bucket of soapy water for a few minutes before rinsing it, maybe doing that with purple shampoo would help?