Homeopathy can be used for dogs, much like it is used in human medicine, although it's important to consult with a veterinarian who is experienced in homeopathic treatments before starting any regimen. Here are some commonly used homeopathic remedies for various conditions in dogs:

Key Homeopathic Remedies for Dog Health Issues

1. Arnica Montana 200: Often used for trauma, shock, bruising, and post-surgery recovery. It's helpful in cases of physical injury or any kind of trauma. For example swollen testicles or any swelling in the body due to injury
2. Apis Mellifica 200: Good for bees and other insect stings. It helps with swelling, redness, and burning pain.
3. Aconitum Napellus (Aconite) 3x or 30: Useful in the very early stages of inflammation or fever. The animal suffers cold with a slight fever and sneezes. It's also used for fear, shock, or panic, such as during thunderstorms or fireworks. For constipation with fever Bryonia 200
4. Nux Vomica 200: Helpful for stomach upsets from eating something inappropriate, or for constipation.
5. Rhus Toxicodendron 200: Used for arthritis, joint pain, or skin conditions that are better with movement. Also indicated for boils or body sores on rainy days
6. Sulphur 200: Good for skin problems, especially those with a smell and itching. Usually, Sulphur 200 is given before other skin remedies (indicated below) to increase healing time.  Works as an anti-itch and stops scratch relaxation in dogs.
7. Pulsatilla 200: Often used for emotional issues, particularly over-clinginess, and for some digestive problems. Also very beneficial where there is a thick discharge (pus)
8. Ledum 200: Used for puncture wounds and for bites from both insects and animals.
9. Calendula: Useful for healing wounds, it can be used as a topical cream or ointment.
10. Silicea 200: Good for expelling foreign bodies like splinters, or any kind of pus formation with blood. Best for sore on the eyeball. Also given in the preliminary stage of tumors
11. Petroleum 200 - Indicated when the dog suffers severe itching and affected parts appear like beehives. sores may be present. Also beneficial for boils in winter.  Tellurium 200 if itching has spread  over the whole body with blotches or spots
12. Bryonia Alba 200  - if the dog does not pass any stool (constipation)or somehow passes dry, hard, knotty stools 
13. Borax 200 - popular for mouth sores. If the sores tend to spread in the mouth palate and tongue Mercurius 200 is recommended. The latter is also very effective in earache and discharge
14. Phosphorus 200 - Diarrhea or Loose stools, distention of stomach, animal remains seated due to weakness. Additionally, Arsenic 200 if dog suffers thin stools, eye sunken and restless
15. Cina 1000 - specific for worm infestation where dog has become weak, dosent drink milk, passes white or dirty urine, grinds teeth or rubs mouth against things.  Santoninum 200 is used if Cina does not show improvement
16. Cantharis 200 - for haematuria, dog passes red urine in drops, with desire to pass it frequently. If animal suffers burning and pain due to extreme form of the disease Berberis 30 is indicated
    
17. Nitric Acid 200 - for any tumors and warts in dogs, this medicine is appropriate
18. (Belladona+Bryonia+Cuprum+Drosera) 30 - for kennel cough that is dry.  Cough with vomit give Ipecac additionally

Additional remedies 

Hair fall & skin diseases in castrated dogs - MT mix (Agnus + Carduus) - 5 drops three times daily. Pills (Thallium 200+Thyroidinum 200) 3 times daily

Ear Hematoma - is very common in dogs especially if they have floppy ears, or those prone to ear infections. This combination is very effective in healing and shrinking ear hematoms in dogs

Dosage Guidelines: Ensuring Optimal Effectiveness

There are several methods for administering remedies to dogs: Tipping the medicated pill directly on to the tongue. Ensure that the dog has not eaten, or drunk anything besides water, within at least 15 minutes before administering the pill and does not eat for at least 15 minutes after.  Liquid remedies administered are directly to the inside of the lower lip.

Dog remedies Kit contains 18 vials of 2 dram medicated globules and 1 unit of 25gms ointment (does not include additional remedies mentioned above)

Remember, homeopathic remedies are highly individualized, and what works for one dog might not work for another, even if they have similar symptoms. The potency and frequency of dosage are also important considerations. Always consult with a veterinarian knowledgeable in homeopathy to determine the best treatment for your dog's specific condition.