K-9 Castle – Denver

K-9 Castle offers dog daycare in Denver, Colorado. Its website lists overnight boarding, grooming, training and live webcams alongside daycare. When we checked in October 2026, it had a Google rating of 4.5 stars or higher across at least 50 reviews, which is our bar for listing.

Good to know for your Frenchie

Small dogs play in their own groups, away from rough play with bigger dogs. Its play areas are climate-controlled, which matters for a breed that overheats quickly. Every new dog starts with an evaluation or trial day. It has live webcams, so you can see how your dog is doing during the day. Before you book, ask how staff handle heat and give dogs time to rest. For the breathing warning signs every daycare should recognize, see our French Bulldog breathing guide.

Sources: Google ratings (used to pick which daycares we list) and the business’s website, reviewed October 2026. Prices and policies change over time, so double-check directly before your dog’s first day.