Vet Cahir is surprised by an unexpected turn of events while helping a pregnant ewe, Nuala amputates a calf's toe to save its life, and Daisy treats a dog that may have swallowed rat poison.

Maurice delivers a valuable litter of 11 sniffer-dogs, Rachel operates on a therapy dog with possibly cancerous skin growths, and a woman with a particular affinity with animals adopts a wild bird.

As winter morphs into spring, lambing and calving keeps the team busy out on the farms. However, their small animal clinic is also packed with pets and Martin Fitzpatrick - the man who founded the practice 35 years ago - faces a difficult case concerning a Highland terrier. Young vet Darren is called out on an emergency to a farm where a prize cow is struggling to deliver a calf. An examination reveals it's simply too big to come out naturally. Darren decides the safest option, for both the cow and the calf, is to perform an emergency Caesarean section. It's a risky operation, but without it, the cow will die.

Newly qualified vet Patrick is called out to help a farmer whose cow has been struggling all night with a difficult labour. Patrick discovers her calf is breached, and has to reposition it. However, once it's in the correct position, a shock discovery makes his job twice as precarious. Back in Castlewellan, a farmer arrives with a two-week-old lamb that's developed a limp. Some antibiotics and a dose of anti-inflammatories will help the lamb back on its feet. However, vet Maeve notices its eyes are milky white and she has to use all her expertise and knowledge to save the lamb's sight.

Vet Jennie saves the life of a show chicken, Darren helps a pregnant cow avoid a caesarean section, and Maurice comes face to face with an exotic visitor.

Vet Jennie must save a litter of puppies, Nuala carries out an important job on her family farm, and an emergency case leaves Darren delivering two sets of twins.