i just bought cindra sculpting gel for dogs. it was $5, plus $5 shipping. i just used it yesterday on Kash, and it works well. i'm assuming it's safe since its made specifically for dogs. here's a link:
CherryGal.com.
others also use pet silk top knot gel for dogs:
Pet Silk Top Knot Hair Gel For Dogs. but it's slightly more expensive.
good luck!