Firstly, apologies for not updating my site recently; as I’m sure most of you are aware it’s lambing season, so I am currently balancing studying and lambing shifts! One of the things I’ve managed to do a lot of this season is foot trimming the ewes before we turn them out with their lambs. I’ve realised how much physical strength is required in order to turn the ewes over – a couple of bruises later, and I think I’m getting the hang of it!
What I wanted to look into on this post, is the reason I’ve found some ewes with bad feet who have clearly suffered from foot rot. This means I’ve injected quite a few ewes intramuscular with Alamycin – another skill I’m quickly getting the hang of!
Scald and footrot are caused by the bacterium “Dichelobacter nodosus”. This is contagious and can be passed onto other sheep especially in the UK climate – very damp and perfect temperature. It causes 90% of lameness in sheep in the UK. It may also be on set during lambing time, when the ewes are in for lambing and the straw becomes wet and warm.
The interdigital skin in the feet becomes red and swollen and covered by a thin layer of white exudate (a mass of cells and fluid that has seeped out of blood vessels or an organ, especially in inflammation). I treated any ewes that I found with this condition using blue spray, alamycin if very bad (to the point where there was a very strong smell) and leaving it untrimmed. We will move these ewes into a separate paddock to reduce risk of infection to other sheep and so they can be treated again in a few weeks. When I was trimming feet during pre lambing checks we used a foot bath which also proved very effective in helping to heal the interdigital dermatitis.