One day I decided to see how many should could hold, and just kept putting them out for her, until her mouth was so full with socks protruding out both sides that I ran out of socks...IIRC, she had around 12 socks in her mouth! Heh, I used to give her a raw egg and she would parade proudly around with it in her mouth not crushing it, her tail swishing back and forth...:) Of course, I found out the downside of encouraging that when a big glass ornament fell off the Christmas tree and she galloped over and snatched it up in her mouth!
Horrified, with visions of a veterinarian visit dancing in my imagination, I slowly approached her speaking quietly and soothingly, trying not to excite her and managed to get that fragile thin-glass ornament out of her mouth, even as she sat there proudly, her tail swishing vigorously from side to side with evident pleasure in her eyes!
Those are tremendous memories!