This has probably already been covered in another posting but I didn't se anything that applied to my situation so I took the liberty of starting a new one.
Duncan seems to have a problem with cats. He actually seems to have a problem with all small animals but cats are the only ones I have ever seen him catch. He loves to chase squirrels and will even run at birds. Luckily, they run up a tree or fly away and are safe. One day, I was walking into my boyfriend's apartment building with Duncan. He was on his leash and even had his "gentle leader" on. Unbeknownst to me, there was a cat in the bushes next to the door. I was having trouble getting the door open (it was locked, my hands were full, I couldn't get the key in, etc.) I dropped Duncan's leash and had my foot on it. Well, that is when he saw the cat and the cat started to run! Duncan ran after it and caught it. ( We were in a parking lot area with the closest tree 100 yards away.) He picked it up and shook it a little side to side before it got away. He then chased it some more in circles and caught it once more before it again got away. The whole catching part when the cat was in his mouth only lasted a few seconds but it was appalling to see. I was trying to catch him and stop him the whole time. Finally the cat found respite under a car and I grabbed Duncan and brought him inside. I went back to find the cat and make sure it was OK but it was gone and I haven't seen it since. I have asked all the neighbors and none of them claim to own the cat or have seen it. (It was an adult large black cat.) Anyway, I was completely shocked at this behavior by Duncan. He gets along with other dogs just fine, although he does love to chase the small ones. I have never seen him act aggressively like that before to another animal. It's upsetting. I guess I can never bring him around cats because he will try to kill them as it appears as if that is what he was trying to do on that occasion. Is this the general consensus of everyone? He is still a puppy at 1 yr old, maybe he can change? Mellow out?

Any opinions? I'm sorry to the cat lovers if this upset you? Please don't snd me hate mail! I love cats and I want Duncan to be able to get along with them!