I posted recently about my dog peeing what looked like pure dark red blood but after a course of antibiotics theres been no sign so far but tonight my eldest dog has now got the same.At night one of my dogs recently started running frantically to the back of the garden( fence leads on to a public path) as though there was someone there and even more worrying the dogs during the day seem obsessed with the grass in that corner of the garden only and im now worried that they may have been poisened.I read it can be a sign of poisoning although its probably not this i cant help but orry.Any ideas why 2 dogs have this so close together? Apart from the bloody urine they are  both in good health,lovely coats,very good healthy diet,walked regularly etc so im baffled.

I'd get a sample from each dog and take them to the vets to check it is blood and not something they have eaten or a condition that has altered the colour of the wee.