Follower Dogs no longer make chomp sounds when in battle, they make yappy bark sounds. Wolves don't seem to make any sounds, no agro, no battle, no howl. It's hard to even know that you're being attack. Hard to believe this was missed in beta testing.

Wolves won't attack if your in werewolf form.

not sure if that helps ya. I don't take dogs as followers.

I definitely miss my Meeko's barks and chomp sounds.
This was the first thing I noticed with Dawnguard installed.
It's like Meeko only has the aggressive warning barks some dogs will give before they attack
but he does this when he's attacking. I hope this gets patched soon.
As for the wolves, I noticed that too. I don't actually hear them anymore, so it's a surprise when they
appear and attack with very little sound if any.

I never said they don't attack, It is hard to tell they are attacking because they make no attack sounds, werewolf or not.
They have running sound files, and hit sound files but the attack "sounds" seem to be gone.
Not regarding werewolves or wolves, Dogs default sounds have been changed.
I am surprised no one else seems to have noticed either of these.

I thought it was just my save bugging out with that one! Dawnguard seems to overwrite and glitch out all Wolf and Dog sounds.

Good to know this is universal.