I only have a small lawn,and it can get really pongy with the dogs weeing on it!Does anyone know of anything I can use to improve it,that wont kill the grass or harm my animals,please?I also have a pongy hen run(two hens)despite digging it over regularly,any ideas very welcome,thanks!

I believe that diluted biological washing powder will not harm plants and it does kill smells. If you are really clever, it may be possible to siphon off the waste water from your washing machine and use that.

oh thanks!will have a go this afternoon!

There is Safe4pets which does odour killers and disinfectants.

Might be worth checking with them to see if it's Safe for birds and the grass.
http://www.safe4disinfectant.com/

:)

thanks,have emailed them!