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Join our community of cat lovers on the Mumsnet Cat forum for kitten advice and help with cat behaviour.

Worried my outdoor cat might catch poisoned mice near our house

9 replies

KittehBoi · 15/05/2026 23:07

Not sure why I'm posting, I think I just need a vent and a hand hold. I've got two cats, girl and boy litter mates who are now 2 years old. They are adorable. My girl is very much a homebody even though she's free to come and go as she pleases. My boy is a source of much worry. He's a fat furry pom pom that doesn't look like he's capable of much beyond purring and snoozing but he's actually an extremely good mouser. Never birds thank goodness, it's only been mice. Our three immediate neighbours love him as he's sorted out their mouse problem this past year. And he's cuddly.

He has just recovered from a week of diarrhoea and upset tummy from eating goodness knows what - third time this year. Very poor appetite, lethargy etc. His usual food is tins of Untamed, and we added probiotics until he recovered. Today he finally looked cheerful and tonight he went out and within an hour had a mouse hanging out of his mouth.

My worry - there's an HMO near our house (we are in London) which is the source of overflowing rubbish bins and all the mice. I suspect they may put out poison traps for the mice, and my fluffy boy might end up eating a poisoned mouse - and die. I've had these thoughts all this past week when he was poorly. The vet didn't think it was poison this time, but I'm so so worried. I've sent notes to all the neighbours to ensure no poison is used for mice, and that they have a natural mouser in this cat. But the hmo often has changes in tenancy and I don't know if this request is even making it through.

What do I do? I'm not sure I can keep this cat in, he's very much an outdoor loving boy. But I don't want him to eat a poisoned mouse! Can cats tell if a mouse has been poisoned and is behaving erratically??

OP posts:
Morepositivemum · 15/05/2026 23:11

Can you report them so they clean up?

7238SM · 15/05/2026 23:16

Cat proof your garden so he can't get into neighbouring properties.
Contact the council about the rubbish
YABU putting notes in peoples doors and telling them what they can and can't do within their own homes!

KittehBoi · 15/05/2026 23:17

Yes, it's an ongoing battle and the council is involved too (the HMO has more residents than it's registered for). But so far nothing seems to be enforced and the rubbish continues to pile up before bin days.

OP posts:
KittehBoi · 15/05/2026 23:20

7238SM · 15/05/2026 23:16

Cat proof your garden so he can't get into neighbouring properties.
Contact the council about the rubbish
YABU putting notes in peoples doors and telling them what they can and can't do within their own homes!

Fair enough. We know most of the neighbours well (our cats visit them) so the ask didn't seem a big one.

OP posts:
Itsahardknocklifeforus · 15/05/2026 23:25

I have put rat poison down in my garden previously. If someone asked me not to, because their cat might enter my garden, I'd tell them to keep the cat inside.

Surely that is the answer.

Do you think your cat eats the mice and gets sick or does he eat the poison directly? I'm asking as I am very fed up with one cat fouling my garden. I've done all I can to make my garden cat proof but in vain.

EBearhug · 15/05/2026 23:40

Don't panic. It's not great if they eat poisoned animals, obviously - but I grew up on a farm, and our cat once came in totally covered in poison powder thst she'd rolled in. We rushed her to the vet and they cleaned her up and checked her, and she lived for many more years.

Cats and dogs (as owners will know) can be sick. Apparently rodents can't, and that's partly how the poison works effectively. They can't expel it like cats can.

Rhaidimiddim · 15/05/2026 23:44

7238SM · 15/05/2026 23:16

Cat proof your garden so he can't get into neighbouring properties.
Contact the council about the rubbish
YABU putting notes in peoples doors and telling them what they can and can't do within their own homes!

This 100%.

Keep your cat on your property or accept that it will be risking its life while out and about.

Rhaidimiddim · 15/05/2026 23:47

KittehBoi · 15/05/2026 23:20

Fair enough. We know most of the neighbours well (our cats visit them) so the ask didn't seem a big one.

Are you going to ask them to not drive, in case your fluffy boy runs in front of their car?

Ponderingwindow · 15/05/2026 23:47

Contain your cat.

people need to address a rodent problem. Asking them to avoid poison is not going to work.

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