My fiance and I adopted Remington in November, when he was a year and a half old. He is an American Bulldog/Pointer mix. From the start, he and our other dog (a Lab/Hound mix) have been almost inseparable; they adore each other. We got them to the park to play with other dogs at least 10 times before Christmas and there were no problems. After the Christmas holidays, things went downhill. Remington began to get increasingly hyper at home (barking at strangers and other dogs more than he used to, pushing past us to get outside when the door was open, etc.). We took him to the dog park where he has had a couple incidences that were minor, but were definitely dog fights.
A week ago, we tried to take Remy to the dog park with Hunter. I took Hunter in (he's a very goofy, laid back dog and has never had a problem with other dogs) and my fiance took Remington to a place outside where he couldn't see the other dogs. We wanted to give him time to calm down (he had gotten very hyper in the car). He did eventually calm down and we got him in the gate to the park. When we knew he was calm, we let him go and he went straight for a female Chihuahua, ending in a puncture wound and a $300 vet bill.
There is nothing wrong with Remington medically; his blood and urine samples all came back okay. He was at the vet the next day and she said there was nothing wrong with him.
Out of the blue, he "turned." He's 100% perfectly okay with people and extremely loving and affectionate towards us at home. Even with a Gentle Leader he sometimes gets out of control if he sees another person or dog come up to him.
My fiance and I are starting to wonder if we should give him to a home where no other dogs are present. We love him though, he is a part of our family and don't want to just give up on him. Any suggestions are appreciated.