Watch Me! - Keri Series, #5

When Claire finds a lump on her chest she can't imagine how it got there. She decides she must have knocked into something. Anyway, there's too much to do to worry about it. Her cousin Keri is coming to stay, there are the horse trekkers to deal with and three horses have gone missing. Keri and Mereana arrive to stay for a week, and find themselves involved in more than just helping out on the farm and riding horses.
Neighbouring farms have been losing sheep and cattle and even a pig is targeted. Then Claire has to go to hospital. With Claire and her mum out of action, Keri and Mereana have to step in to help out, but before long it's not just animals who are abducted.