Yes collars can hurt their trachea and their neck bones. Harnesses are much safer to use. If they are pullers, attach the leash in front on the harness instead of on the back, so if they pull hard, it turns them off course. Eventually they will quit pulling. My Toby liked to lunge full out forward out of nowhere, drove me nuts, hooking the leash in front cured this.
Oh, cool! Thanks for the tip!Yes collars can hurt their trachea and their neck bones. Harnesses are much safer to use. If they are pullers, attach the leash in front on the harness instead of on the back, so if they pull hard, it turns them off course. Eventually they will quit pulling. My Toby liked to lunge full out forward out of nowhere, drove me nuts, hooking the leash in front cured this.
Sounds like you are ready!Making a list, so far I have:
Tennis balls (they've never been interested, but I think putting them on a muffin tin would be more exciting... while we're at it, any tips for teaching them catch? They're never even that interested in the ball)
Treats and biscuits
Birthday present
Bandanas (party favor/dress code)
Hmmmm What else? We already have pee pads, we use them in their crate under the cover because sometimes they leak
This sounds fun, dogs love to forage around!
Look at those sweet faces!!! 
