KREMORV Bird Spikes Bird Deterrents Outside Pigeon Spikes with Plastic Base for Small Bird Pigeons Crows and Woodpeckers, for the Fence, Roof and Balcony

These have been put in a planter where cats have been using it as a toilet. They don’t anymore, thinking of getting some more

BEWARE the strips are only 25mm (10 ins) long "not as shown in the diagram". However, an excellent product spoiled by having to build it yourself with no instructions. Be warned - you will need strong and dexterous fingers. Once you work out what you need to do it is simple but time consuming. The kit is comprehensive and appears to be good quality.