I have just got Drontal tablets to worm the dog and see that there are different size tablets, one for small dogs to 10 kg with 145mg Pyrantel embonate, 50mg Praziquantel & 150mg Febantel the other for large dogs with a dose of 1 tablet per 20 - 35 kg, with 504mg Pyrantel emb., 175mg Prazi & 875mh Febantel. Could this be the cause of the deaths as using the larger tablets would alter the dose rate quite drastically. Which size tablets are quoted in the recommended dose rates?