I'm very happy that you've found stuff to forage & managed to get a lot.
There'll be much more next Spring.
There's a small problem with thorney things. Buns can't see what they're eating - they select by sense of smell & touch - whiskers & lips.:shock:
Just as they very rarely stab themselves in the eye with hay, they can technically do so with thorns.
I either bend them back into the same plane, so when I put the twig down they're flat on the ground or cut them off, so no thorns are sticking up.
Yes, hawthorn loses it's leaves every year. This year is very abnormal. I think it's the drought, & we've lost the deeper underground water so the trees are the worst affected. It's from about Yorkshire South & worst in East England. The leaves on your photos are starting to go yellow. That means they are getting ready to fall. If you get rain they will hang on longer, but if it gets hot, you've maybe about 3-4 weeks left.
Re. mint sorry I can't help because my bun doesn't eat much variety &
throws a temper tantrum with most herbs cos he can't chin scent them & ends up being scented by them!:lol: that's not on for a bunny. :lol: