Well...i have only one word: CONDITIONER! After Mojo went in the pool i started getting sick, had a fever and was in bed for 3 days with a real bad throat infection...so my lil guy only got a bath 4 days later and his hair was a biig ball of mats, i mean, i cried just in thinking how had it would be to comb thru it...even thought about giving him a puppy cut...thankfully, after a conditioning bath that took 2 hours, the mats were gone, but i learned my lesson
Also, i know that the beach will damage the hair even more because of the sand...it would be good also to clean and dry the ears daily, just in case!!
Ahh, and in the pool my bf uses the power chlorine and also i guess i would be good to wait a few hours or even a day before letting your yorkie go in the pool!