The RSPCA is investigating and urgently appealing for witnesses after a puppy was dumped in a kennel with the decomposing bodies of her two siblings, in a case which has been described by an RSPCA inspector as one of the “most distressing” she has seen.

The terrified and poorly dog was found by a member of the public in Grange Road North, Runcorn, on Tuesday (9 October).

Inspector Lisa Lupson, who is investigating for the animal welfare charity and described it as one of the most distressing cases she has witnessed in her 12 years working for the charity RSPCA.

She said: “It was truly horrendous – this poor dog was so ill and was so frightened. She didn’t want to be separated from her siblings, who are thought to have been dead for a number of days. She is so loyal she wanted to stay with them.

“It must have been horrendous for her to be there all that time with them all that time.”

The puppy, thought to be aged around one, has been named Biscuit and she is now being cared for at the RSPCA’s Greater Manchester Animal Hospital.

Lisa added: “She is the sweetest little thing. When we got to the hospital I gave her biscuit and in spite of all she had been through she wagged her tail – so we have decided to call her Biscuit.

“She is in a poor condition, suffering from mange and she is very underweight, but we are working very hard to get her better.

“I am so grateful to the residents who rallied round to help me last night and know many of them were utterly appalled and horrified by what they had to see.

“We are urging anyone in the local area who has CCTV footage to get in touch with us as it may help us find out who did this. There is somebody out there who knows who did this and we urge anyone who can help us with our investigation to get in touch with us on 0300 123 8018.”

Gareth Forshaw, who found Biscuit, was alerted after his dog, a Cavalier King Charles called Lily, began barking out of the window towards a lane which runs at the side of his house.

He went to investigate and came across a wooden kennel before discovering the horrific scene inside.

He said: “I thought it was a strange thing to be dumped so I went to have a closer look and then when I peered inside I could see two dead dogs  - and the smell of their decomposition hit me.

“There was another dog out of the kennel in a terrible state, with very little hair, which ran off.

“Me and a neighbour went to get some water and food for the poorly dog and backed away from the kennel. She then came out from where she was hiding and drunk all the water and ate all the food before jumping back in the kennel and laying on the dead dogs.

“She was so scared. It was awful and really upsetting for all the neighbours who were trying to help, especially as we knew she had been left with the dead animals which were probably family members.