What damage do worms cause?
Intestinal worms feed off the dogs intestinal contents and can damage the gut lining, causing loss of blood. In large numbers they can cause diarrhoea, dehydration and anaemia, and may lower your dog’s immunity making them susceptible to other diseases. If there are a lot of worms your dog may cough, lose weight, and have a rough, dry coat or a ‘pot-bellied’ appearance. Worm infestations in puppies can be particularly serious, causing poor growth and sometimes even death. If there are large numbers of worms the intestine can become blocked (although this is rare in an adult dog) and this may be fatal.