It's actually the bulldog that is being territorial lol. I was so concerned about Stella wanting to be the dominate one so from day one she relieved a lot of training. I also taught her to pick a different toy when Sampson took hers. She has been extremely easy to train in comparison to the bulldog (he is a stubborn one) and he has obsessions (tennis balls, drills, things that bounce) we seriously cannot have them out without him losing his mind ha. Then there are other things that he could care less about. Stella is still a pup so I don't want to risk her getting feed up one day and then there being a battle between them. I used to take the toy away and put it up if Sampson took it from her mouth, but I never thought to give it back to Stella. We make Stella sit and wait before she can eat but we don't do it with Sampson. They get along well together overall, but I just felt a little concerned about the possessiveness.
I appreciate all the help and advice! I do know Sampson responds well to positive reinforcement so do you think I should take the you from Sampson say "no" and then after Stella gets it back then give Sampson a treat??
I suggest not giving any dog special treatment. Do to one the same thing as the other.
I'm not a fan of taking a toy and giving it back to the other dog. This can foster resentment between the two. The better approach is to stop the taking of the toy itself.
Okay, please remember, this may not apply to the naturally possessive Corso... But dogs, in general, normally exhibit resource guarding. If one dog considers the toy a valuable resource, he will give a "this is mine, back off!" signal. If its not valuable, he'll just go and find another resource, or do something else. No problem with this. If resource guarding starts to happen, that's when you would step in to manage the situation. The dog who got the valuable resource first gets to keep it. So, when you notice that "this is mine" signal (usually manifested by a certain look which may or may not be accompanied by sound) when the other dog gets ready to take the toy, that's when you need to get ready. The ideal scenario that you want is for the second dog to defer (he gets the "this is mine" message and goes "oops, sorry" - well, if he was human, lol). If the other dog does not defer, he'll challenge the "this is mine" message and would give his own "this is mine, give it!" look with a follow-up lunge for the toy. You need to stop the dog before the lunge. A lot of times, though, a "give it!" challenge causes the first dog to defer and the dogs can live forever with this without problems. But, the problem is when an unfamiliar dog comes in the mix (at the park, at a sitters, when dogs come to visit, etc) the dog could do this challenge to a bad outcome.
Sorry, I'm being too wordy... as usual... Anyway, in summary - only correct if resource guarding is present. Non-valuable resource to one dog may be given to the other dog with a simple resource replacement. Valuable resources go to the first dog - if it occurs naturally, no need to correct. If challenged, correct before the resource is taken. If you can't stop it before the take happens, it is better to only give that toy to the dog when the other dog can't get to it (in their closed crate or when they're separated). An optional step is to offer the second dog a replacement resource when you successfully stop him from taking the valuable resource.
Ok, that said... Resource can be anything - toy, food, bed, a spot by your leg...