@JENGOSMonkey said in Puppy Aggressively Biting:
@mickey I was taught to grab the pups bottom jaw. Thumb under the tongue and curled index finger beneath the lower jaw. Do this when the pup starts biting you. Apply a little downward force on the jaw. They will not like it and should stop biting. If the pup continues to bite apply a little more downward force until they stop.
This is usually very effective when they're young and first start exhibiting biting issues. This is usually the best way to prevent it from becoming a real problem when they get older.
However, OP's puppy is 8 months old and has been rehearsing this behavior already. If the dog has a real problem with biting, then the thumb under the tongue may amp the dog up and encourage him to be more fierce.
Of course this depends on how relentless and tenacious the dog is, and how long they've been rehearsing the behavior and learning to enjoy it, but Basenjis (in general) are known to fit this description. A lot of times the problem dog won't bite your finger in their mouth, but when you take it out, they lunge right back at you.
This technique is still worth a try though, but if it doesn't work or if the dog keeps biting, then you may want to stop.