I'm pretty sure it's because I'm pregnant and therefore a hormonal mess but the vet just made me cry when he told me my two cats don't like each other 
We've had Fudge for 3+ years and Polly for roughly 15 months but Fudge has recently developed crystals in his urine and the vet thinks it's stress related. He asked if Fudge gets on well with Polly and I said I think so - they don't fight. He asked if they groom each other to which I replied no and he said "Then they don't like each other. They tolerate each other at best". Now I feel like an awful person for bringing Polly into the fold and putting Fudge through unnecessary stress :'(
Is there any way to try to create a bond between two unrelated cats or will they dislike each other forever? I thought I was doing the right thing when I first introduced them - I bought Feliway and kept Polly in a separate room for a couple of weeks before slowly introducing them. I thought they were ok - they don't groom each other but they often sleep on the same bed together. Polly has tried to groom Fudge in the past but he has only let her do it twice and these days he tends to up and leave whenever she gets near him. I keep their food and litter trays separate too. Any advice?

We've had Fudge for 3+ years and Polly for roughly 15 months but Fudge has recently developed crystals in his urine and the vet thinks it's stress related. He asked if Fudge gets on well with Polly and I said I think so - they don't fight. He asked if they groom each other to which I replied no and he said "Then they don't like each other. They tolerate each other at best". Now I feel like an awful person for bringing Polly into the fold and putting Fudge through unnecessary stress :'(
Is there any way to try to create a bond between two unrelated cats or will they dislike each other forever? I thought I was doing the right thing when I first introduced them - I bought Feliway and kept Polly in a separate room for a couple of weeks before slowly introducing them. I thought they were ok - they don't groom each other but they often sleep on the same bed together. Polly has tried to groom Fudge in the past but he has only let her do it twice and these days he tends to up and leave whenever she gets near him. I keep their food and litter trays separate too. Any advice?