Good With Dogs:⬛⬜⬜⬜⬜⬜⬜
Yes, the Mountain Cur is a very athletic dog and can easily jump a 2 - 3 foot fence. For a breed like Rudy, I would suggest 5 - 6 feet tall and make sure that he can not jump and then climb it after jumping it.
The Mountain Curr is a breed unto itself, so for your first question; no the Louisiana Catahoula Leopard Dog is not a Mountain Curr. However, because the Mountain Curr and the Lousiana Catahoula Leopard Dog were bred/created in the same area it is not uncommon for them to look like each other. Since the L.C.L.D can have so many different colors and combos to their coat. A lot of rescue dogs will develop the habit of wanting to be as close to their owners as possible because of the lack of affection/touch they got while either as a stray or in the rescue itself. It's natural, as the Mountain Curr tends to attach itself to one or two in the family and become very bonded with them. As for your female licking your male dogs genitals, it is a normal social behavior that young dogs will display. Some of what they can discover about another dog via this type of investigation is: age, gender, over-all health, sexual readiness, status within pack and where the other has been in the last few days (what have they been ingesting). Tasting is not uncommon, although most adult dogs will only tolerate a moment or two of this level of investigation. Younger dogs tend to linger longer, and typically when they do this to an older dog, the older dog will stop them after a moment, and this is how the younger dog learns the limit for such behavior. If you dislike the behavior, interrupt it after about 10 - 15 seconds by calling your girl away from your boy and distracting her with a treat or toy. She will learn as time goes on the social-doggy etiquette as time goes on. At only 5 months old she is just starting to enter puberty herself and so her hormones are changing and she is learning about the opposite gender of her species.
No, that's not correct. There is an actual breed called a Black Mouth Cur. It's a breed unto itself. Any other mixed breed can be referred to as a "cur" or mutt.
I have a Mountain Cur, her tongue on the top does have the spots, not sure underneath. She does not have webbed feet. :)