Dog days of summer? One in three dog owners feels like a bad pet parent during the warmer months, new data reveals. The survey of 2,000 dog owners found that 39% feel their dog suffers in the summer due to reduced walks and worries about overheating. That’s led to dog parents getting creative in a bid to keep their fur baby entertained — from DIY pup-sicles and baby-pool splash sessions to indoor agility courses and movie marathons. The survey conducted by Talker Research on behalf of MedVet also found that 77% of dog owners have canceled outdoor activities like walks…