This toy was suggested to me a while back, it's worked out really well.
https://www.amazon.com/PetSafe-Busy-Buddy-Squirrel-Medium/dp/B000A61GNO
Mine also loves antlers, ropes (he plays tug-of-war with my Boston Terrier), and Chuckit rubber balls that I got off of Amazon for like, $4 for two of them.
PetSafe Busy Buddy Squirrel Dude Dog Toy - Treat Dispensing Toy. Found em 2 be better than Kongs as they are pretty much just as tough and have 4 little finger like pieces that stop the treats falling straight out without a lil effort and these can be trimmed depending on your treat size you wanna put inside.
ttps://www.amazon.com.au/Petsafe-Busy-Buddy-Squirrel-Medium/dp/B000A61GNO
This purple squirrel treat puzzle toy was suggested to me on this subforum a while back, and has been very good for my ACD. He and his older Boston Terrier brother love it to death, and yet haven’t come close to tearing it apart like they do with almost any other toy.
As for chews, antlers are great. My ACD loves them. It’s just a matter of being able to find them for cheap.