I'm really sorry to hear this it's awful when you lose one of your babies x
One of mine died at the ripe old age of about 9 and her mate took up under a pile of bedding with her nose sticking out and didn't move only to pull out fur and eat and drink very little over the next few days....she lost weight and the usual noisy squeaks turned into what i can only describe as pittifull squeaks so week later I bought another and the change was unbelievable. I would definitely do the same should we be in the same position...they are social animals and don't seem to be able to live alone after having a friend for so long, even if Robyn ony lived for another year or so I couldn't leave her alone she wouldn't have lasted another week the way she was going xx

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Staffy x Lab almost 10...Fizz
Ginger Tom 2 1/2...Tilly
Bichon x King charles spanel 1 yr 10 months
Latest addition Tex the black shep 11 1/2 years foster pooch
How can I forget my fish..i have 13 tropical fish too...err...2 cats 2 neon and one lemon tetra...2 err...will have to go look and get back on that one i can't remember the names lol
My Dogs are the centre of my world
RIP Dolly Sadly Passed away 7pm 6/3.2011

I understand what you mean about the 'endless loop' of one dying and needing a friend etc. I do agree with what others have said that they shouldn't live alone. Yes of course they can live on there own but in my opinion they live a more fulfilled life if they have a friend. Its so nice seeing them playing and interacting together I couldn't imagine just having one.

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RIP Rose, Harriet, Bella, Cassidy, Louis, Lacey and Timmy forever in my heart xxx

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Please call you nearest rescue centre and arrange to take your piggy in to meet other piggies. I've had piggies live til 7-8 you wouldnt want to spend the next 5 years alone and neither would your piggy. We dont speak their language no matter how much time we spend with them. We dont snuggle up and sleep with them for half the day. He is probably a very lonely and cold piggy

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So very sorry for your loss, I don't really have any advice on what you should do but if it was me I would be looking for a friend for him because piggies need friends.