The online vet clinic shop you're looking for has

relocated
Your vet's online shop was run by the team at My Rover in response to the
Covid outbreak.
My Rover's Shop has done its job and kept everyone connected to their vet clinic during an isolating time.
Don't worry, you can still buy your products from your clinic directly. In many cases there will be a new shop for you to buy through shortly.
Contact your clinic for more details.
— From the team at My Rover Shop.