Hi so I bought the sentinel dog chews for medium dogs for my pup who is nearly 11 weeks. On Wednesday last week she had her 2nd vaccination and a health check. The vet weighed her and she was 7.5 kilos. I bought the chews thinking she was heavier (before I saw the vet). These chews are for dogs weighing 11-22 kilos. Should I buy different ones or just half them? Unsure what to do?!?