Help! Is there something wrong with my kitten?

I had a new kitten last week, he is the most playful loving little kitten. But I am a bit worried about his poo. He eats so well and uses the litter tray everytime he needs to go, except one accident in my bed which I think it's because he couldn't get down. The problem I'm having is his poo is like a toothpaste kind of shape, he poos about 5-6 times a day, about half hour after his food. The colour of it changes depending what flavour food he eats. I have stuck to felix thinking it is one of the best? But I am having doubts about it now! I have wormed him thinking it could be that. He doesn't seem in pain or that it's bothering him. He's such a good little boy will go to his litter tray straight away. He also drinks water, I make sure he is fully topped up with fresh water all the time! Some people have suggested maybe the food is too rich for him and maybe try him with something different and maybe dry food. When I got the kitten his owner told me he was eating any kind of brand of food. Could this be why? Could I be over feeding him? I am
Worrying so much about it and I'm not sure if I should be? I love him so much and I just want to make sure I am doing the right thing for him. could anyone help me put my mind at rest, please!

Here are some guidelines to go by.

I suggest you call your vet for advice to be sure.  

Stool Color:

• Bloody  - Actual red blood seen in stool. Could indicate panleukepenia. Grossly abnormal, must be seen ASAP.
• Mucous  - yellowish/white/clear slimy substance. Indicates severe bowel irritation. Grossly abnormal and needs immediate care.
• Black  - True dark black color to stool. Usually indicates bleeding high in the bowel.  Severe sign, needs immediate attention.
• Brown  - Normal color. Be happy!
• Orange  - Usually indicates way too much bile in stool, can occur with reflux.Seek medical advice.
• Yellow  - Almost always indicates bacterial imbalance in the bowel. If has diarrhea also, usually related to coccidia. Seek medical advice.
• White  - Grossly abnormal color, usually indicates, severe bacterial imbalance and severe infection in the bowel. Kitten at risk of dying, needs medical attention, ASAP.  

Consistency:

• Dry/hard  - Abnormal, usually indicates dehydration. Seek care, promptly.
• Firm  - Normal, be happy.
• Formed but soft  - Low range of ‘normal’. If stools change from firm to soft you should seek medical advice.
• Toothpaste  - Still has somewhat tubular form but falls apart once touched. Abnormal, needs medication.
• Cow-patty  - Never formed but thick enough it falls into a ‘cow-patty’ shape. Abnormal, animal is at significant risk and needs immediate attention.
• Liquid  - Just fluid that falls out of rectum, thin and may have mucous. Abnormal, animal is at severe risk and must be seen immediately.
• The ‘Squirts’  - Animal has no control over bowel and watery fluid squirts out of rectum. Grossly abnormal, animal in danger of dying, must be seen immediately!

Okay great Thankyou!