Living With a Diagnosis: What Your Vet Told You, and What to Ask Next
For the owner leaving the clinic with a new word and a decision to make. Where to start for lumps, kidney and heart disease, and what to ask next time.
Written by thecanineledger
This page carries no advertising, and nothing on it is for sale.
1. Start where you are
| If you are… | Start here |
|---|---|
| Worried about a lump you’ve found | §2: A lump |
| Told your dog has a mass on the spleen | §3: A mass on the spleen |
| Told your dog has kidney disease, or given a stage | §4: Kidney disease |
| Told your dog has a heart murmur or heart disease | §5: Heart disease |
| Getting ready for the next appointment | §6: Questions to ask next time |
| Wondering how this section works | §7: How this section works |
Many owners leave a vet appointment with a word they’ve never heard and a decision to make. It’s hard to take in information in the room, and harder to remember the questions afterwards.
While this section can’t replace your vet, it can help you understand what you were told and prepare for the next conversation. Each article explains one diagnosis, what the evidence says, and what to ask.
2. A lump
Most lumps on dogs are harmless, but no one can tell which by touch. A veterinary oncologist’s rule of thumb is that a lump the size of a pea, present for a month, should be sampled with a needle (Ettinger, dvm360, 2015). It is expert advice, not trial evidence.
→ Found a Lump? Why Your Vet Should Put a Needle in It
3. A mass on the spleen
The odds depend on how the mass was found. In one study, 70.5% of masses found by chance that had not bled were benign (Cleveland & Casale, J Am Vet Med Assoc 2016). Masses that had bled were more often cancer.
If your dog collapses, has pale gums or a swollen belly, go to a vet now.
→ A Mass on the Spleen: Why “Two-Thirds Are Cancer” Is Out of Date
4. Kidney disease
Vets stage chronic kidney disease from 1 to 4 using guidelines from the International Renal Interest Society. The stage guides treatment; IRIS describes its purpose as “to facilitate appropriate treatment and monitoring” (IRIS Staging of CKD, 2026).
→ Chronic Kidney Disease: What the IRIS Stage Means
5. Heart disease
For a dog with heart disease, the single most useful thing an owner can do at home is count breaths during sleep. The 2019 cardiology consensus says a rise above the dog’s normal “has the best predictive value for impending clinical decompensation” (Keene et al., J Vet Intern Med 2019).
→ Heart Failure at Home: Counting Your Dog’s Sleeping Breaths
6. Questions to ask next time
Write these down before the appointment, and the answers during it.
- What is the diagnosis called, and how sure are we?
- What else could it be, and does that need testing?
- What are the treatment options, including doing nothing? What does each cost?
- What should I watch for at home? When should I call, and when should I come in?
- When is the next check, and what will it measure?
- Is there a specialist who sees this often?
It’s reasonable to ask for a written summary, or to ask whether you can record the explanation.
Our note: Some clinics may have a policy on recording. Ask first.
7. How this section works
Each article starts from the consensus statements written by veterinary specialist colleges where they exist, then the best available studies. We say when the evidence is thin, when a figure comes from one country or one hospital, and when a recommendation is expert opinion rather than trial evidence.
We don’t give doses or recommend products. Where a diagnosis may lead to end-of-life decisions, articles link to our End of life section. → Saying Goodbye: An Evidence-Based Guide to Your Dog’s Final Chapter
8. What we could not verify
| Commonly said | What we found |
|---|---|
| “Soft lumps are always fatty lumps” | Not safe to assume. Only a sample tells. |
| “Two-thirds of splenic masses are cancer” | Too simple. It depends on whether the mass has bled. |
| “Over 30 breaths a minute means heart failure” | Not a guideline cutoff. The guideline uses a rise above the dog’s own baseline. |
Sources
- Ettinger S. See Something, Do Something: Why wait? Aspirate! (dvm360, 2015; trade magazine, expert opinion; read)
- Cleveland MJ, Casale S. Incidence of malignancy and outcomes for dogs undergoing splenectomy for incidentally detected nonruptured splenic nodules or masses (J Am Vet Med Assoc 2016; abstract read)
- International Renal Interest Society: IRIS Staging of CKD (modified 2026) (read)
- Keene BW, Atkins CE, Bonagura JD, et al. ACVIM consensus guidelines for the diagnosis and treatment of myxomatous mitral valve disease in dogs (J Vet Intern Med 2019; full text read)
Always confirm with your vet before acting on anything on this page.