They look like they could cause a problem but if they never do then leave them. If they are connected to bone they are hard to remove in adults and could cause life long pain if removed. Again unless they are in the way or she is in pain I would leave them. Your dogs toes in the back are not like most dogs and I think that is a genetic flaw in how far back those toes are but since she is a rescue it doesn't matter
Some dogs just do not like getting their nails cut no matter what you do. I suggest you learn how to do them yourself and just make her get them cut. I have a few difficult dogs to but I do not have time to ask them nicely, lol I have about 20 dogs to cut nails on. What I have found that helps me and the dog is to do them standing up kind of like shoeing a horse. You can straddle them between your legs so they cannot back out and pick up one paw at a time and do it that way. The other dogs who don't care I just have them lay down on their side and I can cut them all quickly the ones who put up a fight get done standing. You really have to be alpha too, if you insist on them standing still and getting the nails cut they will submit but sometimes they still are not happy about it. I am a dog trainer and when I see clients I usually end up doing the dogs nails. It is a dog who has some behavior issues big or small but will let no one cut their nails. I just put a muzzle on them and cut the nails in a matter of minutes.
LMAO I just remembered Ask Dave (redog) when I was visiting and working with his pain in the butt mastiff. I was 8 months pregnant and not going to let that dog win, I was laying on top of him (the only way I could do them) till he got his nails cut. I almost went into labor over those nails!
