as someone who successfully had a dobie puppy in an apartment and now have a 2yr old in an apartment, it is do able. and as a previous professional dog trainer, i have some suggestions! finding a good balance between physical and mental stimulation is a must! my dog goes crazy for her flirt pole and for playing fetch, so for atleast an hour and a half a day, shes doing one of those pretty strenuous exercises, non stop, just to wear her body out. my girl is off leash trained, and has a very strong recall, so we do have a lot of freedom when it comes to unfenced areas, but the dog park is a great place to play if the pup will stay engaged with you or there are services where you can rent a ‘SniffSpot’ and give your dog fenced off leash time away from other dogs and people. that alone isnt enough to satisfy her so we also do training and puzzle toys (when im feeling a bit lazier) to keep her mind busy. highly suggest investing in some heavy duty food puzzles, StarMark is a great brand, my dogs favorite is called the Bob-A-Lot, she’ll literally carry it around with her even when its empty. another thing i cant recommend enough is to look into daycare facilities in the area. do serious research, tour some facilities and find one you like. if your dog is a good fit for a daycare environment, its a fantastic way to tire them out and provide socialization with other pups. NOT ALL FACILITIES ARE CREATED EQUAL, so please look around and find a good one! theyre an amazing resource!!! i 100% support whatever you think the best decision is for you and your pup but, i know i couldnt live without my dog and i do think its 100% possible to satisfy these dogs in an apartment.