It’s no big secret that Grey’s Anatomy star Katherine Heigl loves to shop, but she also loves to buy things for her four dogs — Weezer, Stella, Romeo and Piper, reports.

According to a pal, she recently treated them all to pricey Hermès dog collars that sell for more than $350 each. That’s not all. The insider says that Katherine, 29, spoils her pooches — they drink filtered water, eat gourmet food and even have their own cashmere doggy blankets.

“Katherine’s dogs are her children — at least for now,” her pal explains.