I had to switch from Sentinel to Trifexis because of the shortage. My vet still had some, but none in the proper dosage for my pups. They just got their second dose yesterday, so far, so good, no problems.
This article reports on the problems at the Novartis plant: Read more:
Most-recent FDA report sheds light on Novartis shutdown, recall
This sentence in the article bothers me:
Last week, the company sent a letter to veterinarians alerting them that a prescription medication for dogs that's made at the Lincoln plant might also be contaminated.