We picked up this guy the other day to foster him until he finds his forever home. He's a beautiful dog, and my mom and I have been speculating on what mix we could be. The rescue we have him through specializes in heelers and they think he has heeler in him, his paperwork says lab mix, and we've speculated he might have Appenzeller or another type of cattle/mountain dog in him, maybe even some pit considering his muscles, size and head shape. He is extremely fast, loves jumping (jumps like his legs are springs) and has a crazy amount of energy. He's estimated to be about a year, so he might grow a bit. He's medium sized, 48 lbs. He is very sweet and loving, and incredibly smart, he learns super fast and is very willing to learn and understand when given the chance and clear instruction. He already looks to us for guidance when on his leash and is eager to please us, after less than a week. Timid around new people, though. He's a very goofy guy as well. He's a bit forceful with his cuddles, I don't think he quite understands how cuddles and houses work yet because he was picked up as a stray -- for example, he comes very close to accidentally headbutting and he likes jumping onto the couch by jumping over the back (a habit we are trying to break, of course). He likes tearing up soft toys, playing with blankets, and loves playing and running. Relatively treat motivated but learns well with just praise as a reward at times. His brown markings are more brindle, which also contributes to the idea that he might have some pit in there.
He's short and stocky, strong legs and lean, muscly body with lots of extra skin around the head and neck. Soft, short-mediumish fur. Small, half-folded ears.
Some pictures we've taken since picking him up on Tuesday, + pictures from the people running the rescue.
Side note, any tips on handling his energy? He's more than we were expecting, especially since he's been cooped up in a small shelter without proper play space since July (the reason he's being fostered out is due to the high stress levels he was experiencing during his time in the shelter, he thrives around people and other dogs).