Need some input

[finn's mom]

lol yep. Did that already. All of them nearest don't have any small to medium sized dogs. All large.

Can a lab mix be considered a medium dog? I think he's lab/terrier mix.

That's quite possible...I've even seen some full labs that are around 50 pounds...just small girls...but, are you looking for a dog with that kind of exercise requirement and energy level? Labs are extremely energetic and need constant daily exercise above and beyond a walk. And, mixed with a terrier, you may be dealing with a really energetic, stubborn dog.